Patent
Analog-to-digital converter with multi-level dither current input
TLDR
In this article, an improved sigma-delta analog-to-digital converter (ADC) is described, which includes a dither circuit fabricated within the package of the ADC.Abstract:
An improved sigma-delta analog-to-digital converter (ADC) is disclosed herein. The digital converter includes a dither circuit fabricated within the package of the ADC. The circuit is configured to apply a dither current to the analog input of the ADC. The frequency of the dither current is selected based upon the bandwidth of the analog signals for which the ADC is designed to sample and convert to digital signals. Application of the dither current to the input of the ADC reduces quantization noises produced as a result of certain ranges of DC offset voltages found within analog signals applied to the ADC.read more
Citations
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Patent
System for enhancing the accuracy of analog-digital-analog conversions
TL;DR: In this paper, an apparatus for enhancing the accuracy of analog-digital-analog conversions is presented. But it does not utilize an explicit dither signal and does not use linear interpolation techniques to achieve the effect of pseudo dither signals.
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TL;DR: In this article, a sigma delta modulator (10) for use in codec applications provides dynamic range adjustment and avoids asymmetrical signal clipping, and is programmably modifiable to provide enhanced performance.
References
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Patent
Plural delta-sigma converters operating in parallel with independent dither generators
Kohji Fukuhara,Yoshio Yamasaki +1 more
TL;DR: In this article, the authors propose to add each output signal of a plurality of signal converters connected in parallel, after a common input signal is inputted to and quantized in the above plurality of converters, so that a highly reliable signal conversion device similar to the above can be provided.
Patent
A-D Converter with fine resolution
TL;DR: In this article, an analog input signal to be converted was subjected to first integration by an integrator and a reference signal opposite in polarity to the input analog signal is subjected to second integration by the integrator.
Patent
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TL;DR: In this article, an A/D converter is implemented by a time constant circuit (70) which functions as an integral circuit for an input analog signal, and functions as a differential circuit for a slope potential.